Struct KsmScanner 

pub struct KsmScanner { /* private fields */ }

Kernel Same-page Merging scanner.

Maintains stable and unstable trees of page content hashes and orchestrates scanning, comparison, and merge operations.

Implementations

impl KsmScanner

pub const fn new() -> Self

Create a new KSM scanner with default configuration.

pub fn init(&mut self)

Initialize the scanner. Must be called once before enable().

pub fn set_scan_rate(&mut self, pages_per_cycle: usize)

Set the number of pages to scan per cycle.

pub fn set_sleep_ms(&mut self, ms: u64)

Set the delay between scan cycles in milliseconds.

pub fn enable(&self)

Enable the KSM scanner.

pub fn disable(&self)

Disable the KSM scanner.

pub fn is_enabled(&self) -> bool

Check whether the scanner is enabled.

pub fn get_stats(&self) -> KsmStats

Get current KSM statistics.

pub fn scan_page(&mut self, frame: FrameNumber, content: &[u8]) -> bool

Scan a single page. The caller provides the frame number and a reference to the page content (PAGE_SIZE bytes).

The scanner will:

1. Compute FNV-1a hash of the page content.
2. Search the stable tree for a match (merge immediately).
3. Search the unstable tree for a match (increment stable_count).
4. If no match, add to the unstable tree.

Returns true if the page was merged (caller should remap as COW).

pub fn unmerge_page(&mut self, frame: FrameNumber)

Remove a page from the stable tree (e.g. after a COW fault breaks the sharing).

pub fn scan_rate(&self) -> usize

Get the configured scan rate.

pub fn sleep_ms(&self) -> u64

Get the configured sleep interval in milliseconds.

Trait Implementations

impl Default for KsmScanner

fn default() -> Self

Returns the “default value” for a type.